Pollution profiles, removal performance and health risk reduction of malodorous volatile organic compounds emitted from municipal leachate treating process
Pollution profiles, removal performance and health risk reduction of malodorous volatile organic compounds emitted from municipal leachate treating process
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城市渗滤液处理过程中恶臭挥发性有机物的污染概况、去除性能和健康风险降低
DOI：
10.1016/j.jclepro.2021.128141
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发表时间：
2021-07-02
影响因子：
11.1
通讯作者：
An, Taicheng
中科院分区：
文献类型：
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作者：
Liao, Wen;Liang, Zhishu;An, Taicheng
城市垃圾处理过程中产生的恶臭挥发性有机物（VOCs）对生态系统和人体健康的潜在危害已引起公众的普遍关注。为此，本研究设计了喷淋塔-生物滴滤塔一体化工艺，对城市渗滤液中的VOCs进行了去除。采用质子转移反应飞行时间质谱（PTR-TOFMS）和气相色谱-质谱（GC-MS）技术，准确鉴定了60种VOCs，总浓度范围为3.54 ~ 26.42ppm。其中以苯（1.31-7.90 ppm）和甲苯（0.93-5.71 ppm）含量最高，占总挥发性有机物（TVOCs）的77.66%。ST-BTF对AHs、含氮和含氧化合物（NAOCCs）、脂肪烃（AIHs）、卤代烃（HHs）和挥发性含硫有机物（VOSCs）的平均去除率分别为60.75%、79.55%、75.01%、81.71%和54.32%。此外，气味的味道，臭氧形成潜力（OFP），和健康风险的研究挥发性有机物后，ST-BTF净化显着减少。与真菌相比，BTF中的细菌群落更丰富和更稳定，以抵抗VOC冲击负荷的影响。拟杆菌属、疣微菌属和Epsilonbacteraeota的丰度显著增加，对HHs的降解起着重要作用。此外，占主导地位的假单胞菌科和假单胞菌属变形菌显着代谢异生物质，预测PICRUSt。这些结果表明，ST-BTF是一种有效的技术，在中等和冲击负荷的VOCs的生态和人类健康风险的衰减。
The potential adverse effects of malodorous volatile organic compounds (VOCs) from municipal waste management on ecosystems and human health have caused general public concern. Therefore, an integrated technique of spray tower (ST) with biotrickling filter (BTF) was designed for attenuation of VOCs from the municipal leachate treating process in this study. A total of 60 kinds of VOCs with total concentrations ranging from 3.54 to 26.42 ppm were accurately identified using proton transfer reaction time-of-flight mass spectrometry (PTR-TOFMS) and gas chromatography-mass spectrometer (GC-MS). Among them, the levels of aromatic hydrocarbons (AHs) especially benzene (1.31-7.90 ppm) and toluene (0.93-5.71 ppm) were highest, occupying 77.66% of total volatile organic compounds (TVOCs). Average removal efficiencies of AHs, nitrogen-and-oxygen-containing compounds (NAOCCs), aliphatic hydrocarbons (AIHs), halogenated hydrocarbons (HHs), and volatile sulfur organic compounds (VOSCs) by ST-BTF were 60.75%, 79.55%, 75.01%, 81.71%, and 54.32%, respectively. Moreover, the odorous flavor, the ozone formation potential (OFP), and the health risks of the studied VOCs were dramatically diminished after the ST-BTF purification. More abundant and stabler bacterial communities in the BTF were developed to resist the impact of VOC shock loading as compared with fungi. The conspicuously increased abundance of Bacteroidetes, Verrucomicrobia and Epsilonbacteraeotal played significant roles in the degradation of HHs. Moreover, the dominant Pseudomonadaceae and Pseudomonas belonging to Proteobacteria significantly metabolized xenobiotics, as predicted by PICRUSt. These results indicated that the ST-BTF is an efficient technique for attenuation of ecological and human health risk under moderate and shock loading of VOCs.